/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.gradle.testkit;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import io.spring.gradle.dependencymanagement.DependencyManagementPlugin;
import org.gradle.testkit.runner.BuildResult;
import org.gradle.testkit.runner.GradleRunner;
import org.junit.rules.TemporaryFolder;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import org.xml.sax.InputSource;
import org.springframework.asm.ClassVisitor;
import org.springframework.boot.loader.tools.LaunchScript;
import org.springframework.util.FileCopyUtils;
/**
* A {@link TestRule} for running a Gradle build using {@link GradleRunner}.
*
* @author Andy Wilkinson
*/
public class GradleBuild implements TestRule {
private final TemporaryFolder temp = new TemporaryFolder();
private File projectDir;
private String script;
private String gradleVersion;
@Override
public Statement apply(Statement base, Description description) {
URL scriptUrl = findDefaultScript(description);
if (scriptUrl != null) {
script(scriptUrl.getFile());
}
return this.temp.apply(new Statement() {
@Override
public void evaluate() throws Throwable {
before();
try {
base.evaluate();
}
finally {
after();
}
}
}, description);
}
private URL findDefaultScript(Description description) {
URL scriptUrl = getScriptForTestMethod(description);
if (scriptUrl != null) {
return scriptUrl;
}
return getScriptForTestClass(description.getTestClass());
}
private URL getScriptForTestMethod(Description description) {
return description.getTestClass()
.getResource(description.getTestClass().getSimpleName() + "-"
+ description.getMethodName() + ".gradle");
}
private URL getScriptForTestClass(Class<?> testClass) {
return testClass.getResource(testClass.getSimpleName() + ".gradle");
}
private void before() throws IOException {
this.projectDir = this.temp.newFolder();
}
private void after() {
GradleBuild.this.script = null;
}
private String pluginClasspath() {
return absolutePath("bin") + "," + absolutePath("build/classes/main") + ","
+ absolutePath("build/resources/main") + ","
+ pathOfJarContaining(LaunchScript.class) + ","
+ pathOfJarContaining(ClassVisitor.class) + ","
+ pathOfJarContaining(DependencyManagementPlugin.class);
}
private String absolutePath(String path) {
return new File(path).getAbsolutePath();
}
private String pathOfJarContaining(Class<?> type) {
return type.getProtectionDomain().getCodeSource().getLocation().getPath();
}
public GradleBuild script(String script) {
this.script = script;
return this;
}
public BuildResult build(String... arguments) {
try {
return prepareRunner(arguments).build();
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public BuildResult buildAndFail(String... arguments) {
try {
return prepareRunner(arguments).buildAndFail();
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public GradleRunner prepareRunner(String... arguments) throws IOException {
String scriptContent = FileCopyUtils.copyToString(new FileReader(this.script))
.replace("{version}", getBootVersion());
FileCopyUtils.copy(scriptContent,
new FileWriter(new File(this.projectDir, "build.gradle")));
GradleRunner gradleRunner = GradleRunner.create().withProjectDir(this.projectDir)
.forwardOutput();
if (this.gradleVersion != null) {
gradleRunner.withGradleVersion(this.gradleVersion);
}
List<String> allArguments = new ArrayList<String>();
allArguments.add("-PpluginClasspath=" + pluginClasspath());
allArguments.add("-PbootVersion=" + getBootVersion());
allArguments.addAll(Arrays.asList(arguments));
return gradleRunner.withArguments(allArguments);
}
public File getProjectDir() {
return this.projectDir;
}
public void setProjectDir(File projectDir) {
this.projectDir = projectDir;
}
public GradleBuild gradleVersion(String version) {
this.gradleVersion = version;
return this;
}
private static String getBootVersion() {
return evaluateExpression(
"/*[local-name()='project']/*[local-name()='parent']/*[local-name()='version']"
+ "/text()");
}
private static String evaluateExpression(String expression) {
try {
XPathFactory xPathFactory = XPathFactory.newInstance();
XPath xpath = xPathFactory.newXPath();
XPathExpression expr = xpath.compile(expression);
String version = expr.evaluate(new InputSource(new FileReader("pom.xml")));
return version;
}
catch (Exception ex) {
throw new IllegalStateException("Failed to evaluate expression", ex);
}
}
}